Elevator-control system



G. BOTSCHEIDER. ELEVATOR CONTROL SYSTEM.

Patented Mar. 7, 1922.

3 SHEETS-SHEET 1.

APPLICATION FILED APR-5.1920.

INVENTOR G. 5arsc7/-7fl ATTORNEYS G. BOTSCHElDER.

ELEVATOR CONTROL SYSTEM.

APPLICATION FILED APR. 5. 1920.

14,4 O9,1 32. a e te Mar- 7, 1922.

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a ammyzg W/ho ATTORNEYS GI BOTSCHEIDER. ELEVATOR CONTROL SYSTEM.

' I APPLICATION HLQED APR. 5, 1920. V 1,409,1 32. Patented Mar. 7, 1922,

3 ISHEETSSHEET s.

IN VENTOR BY 7 ,wiliGjniv fi ATTORNEYS PATENT ()FFICE.

GEORGE BOTSCHEIDER, OF SAN FRANCISCO, CALIFORNIA.

ELEVATOR-CONTROL SYSTEM.

Application filed April 5,

To all whom it may concern.

Be it known that I, Gnome Bors'oi-inmnn, a citizen of the United States. and a resident of the city and county of San Francisco. State 01 California, have invented a certain new and useful Elevator-Control System, of which the following is a specifiation.

The. invention relates to elevator control systems and particularly to systems for limiting the movement of the lever which controls the movement ot' the car when the elevator door is unlocked or open.

An. object ol the invention is to provide means or holding the elevator control lever to limited movement when the elevator door is unlocked or open. 7

Another object of the invention is to pro vide means for simultaneously unlocking the elevator door and imposing a barrier to the movement of the control lever.

The invention possesses other advantageous features, some of which. with the foregoing, will be set forth at length in, the following description where I shall outline in full that form of the invention which I have selected for illustration in the drawings accompanying and formingpart of the present specification. In said drawings, I have shown several specific forms of the apparatus of my invention, but it is to be understoot that I do not limit myself to such forms, since the invention, as set forth in the claims, nuy be embodied in a plurality or". other Forms.

Referring to said drawings:

Figure l is a section of an elevator shaft haring a car therein provided with one form of apparatus of my invention.

' lligure SZ'is a section of anelevator shalt having a car therein provided with a modified form of apparatus of my invention.

Figure 3 a section of an elevator shaft showing an electric elevator provided with a modified form of apparatusof my invention.

Figure at is a detail of the lock bar used in the construction shown in Figure 3.

The apparatus of my invention is applicable to hydraulic and electric elevators, with equal efiiciency, and operates to limit the movement of the control lever of the elevator car, when an elevator door is unlocked or open. The permitted movement Specification of Letters Patent.

Patented Mar. 7, 1922. 1920. Serial No. 371,398.

of the control lever is suilicient only to maintain the car at the floor from which it may slip due to leakage or to permit a very slow movement of the car to bring it into alinement with the floor.

In the arrangement shown in Figure 1 means are provided for limiting the movement of the control lever when the door is open, either partly or wholly. The control lever 2 is normally movable to either side of the vertical or neutral position. to control the elevator or descend. The lever is usually disposed in a housing 3 having a slot in the top in which the. lever moves. h' ounted on the housing is a vertically movable slide r having a head 5 provided with a seat or depression (3 therein, which head is normally disposed below the path of a pin or ur-ojection 7 on the lever. The seat 6 is of less length than the throw of the projection T and when the slide is elevated. the projection T is dis posed in these-at, so that the lever is capable of limited. movement only in either dircction. In a hydraulic elevator, the amount of movement of the lever is sufiicient to overcome any creeping ot the car due to leapty valves. and in electric elevators the amount of movement of the lever is sufficient to produce a very slow iovement of the car. In the construction. shown in Figure 1. the slide 4 is raised by the opening movement of the elevator door 8 and is held raised during the time that the door isopencd. Secured to the door 8 is a bar 9 having an inclined end 10, which when the door closed, lies under the roller 12 on the bent lever 13 and as the door is opened the roller moves up over the incline onto the high surface oi the bar 9, rocking the lever 13 on its pivot. The other end or the lever is provided with .a. roller 14, which lies in position to he engaged by the movable cam 15, pivotally mounted on the elevator car. The cam 15 is mounted on two levers16, so that it is movable laterally while retaining its vertical. position. Pivoted to the lovers 16 is a link 17 which is connected to the slide 4 by suitable means, such as the bell-cranks 18 and 19 and the link 21. lVhen the car comes to restat a floor, the roller 14 is in contact with the cam 15 and the opening movement of the door causes the lever 18 to push the cam 15 backward, raising the slide 4 and holdmotor to cause the car to ascending the control lever to limited movement. The control lever 15 held in this position until the door is again fully closed.

In the construction shown in Figure 2, means are provided'for causing the unlocking of the door to limit the movement of the control lever. In this construction the bar 9 is provided with a notch into which the end of the locking lever 22 falls, to lock the door in the closed position. The locking lever 22 is provided on its other end with a roller 23 which lies in the path of guideway formed between the two guides 24:, the two guides being secured together forming a guide structure. This structure is mounted on the levels 25, so that it is movable laterally while maintaining its vertical. position. The levers 25 are pivoted to the link 26 which extends downward, the lower end of the link lying below the car floor 27. The link is provided with a handle 28 for moving it vertically and at its lower end is suitably connected to the slide 41. Movement of the link in a direction to unlock the bar 9 raises the slide 1 to a position to restrict the movement of the control lever 2. With the initial opening movement of the door, the bent lever 13 is actuated to move the cam 15 and the link 17. The link 17 is connected to the slide 29 which is moved under the lower end of the raised slide 4, thereby preventing the slide from being lowered as long as the door is open.

The construction shown in Figure 3 shows the application of the invention to an electric elevator. In this construction the link 26 is moved vertically to release the locking lever 22, as in the construction shown in Figure 2. The control lever 31 is secured to a gear 32 which meshes with a rack on the rod 33 which extends downward through the floor of the car, where the rod is provided with two spaced cylindrical enlargements 34 35. Connected to the link 26, in such manner that it is moved longitudinally by vertical movement of the link, is a controller lock bar 36. This bar is provided with a hole 37 which is larger than and normally alincd with the enlargements so that the enlargements may readily pass through the hole as the controller lever is moved. The bar is also provided or slots 38 extending longitudinally from and communicating with the hole 37. When the control lever is in neutral position, the enlargements lie on opposite sides of the bar and the unlocking of the door moves the bar longitudinally sothat the rod 33is displate and means connecting with smaller apertures posed in a slot 38 which is too small to permit the enlargements to pass. The enlargements are spaced apart sufficiently to permit a limited movement of the control lever.

I claim: I

1. The combination with an elevator shaft, a door on said shaft, a car in said shaft and a controlling lever in said car, of a cam carried by the car, a door lock cooperable with said cam, means operable independently of the lever, for" actuating the cam to unlock the door, and means connected to said actuating means for limiting the movement of said lever, and including a plate having a key hole and a locking pin connected to the lever.

2. The combination with an elevator shaft, a door on said shaft, a car in said shaft and a controlling lever in said car movable to either side of a neutral position, of a'shaft connected to said lever, spaced enlargements on said shaft connected by a narrow neck and a plate having a key hole therein associated with said shaft and cooperating with said enlargements said shaft passing through said key hole and means for moving said plate to lock the lever in neutral position.

3. The combination withan elevator shaft, a door on said shaft, a car in said shaft and a controlling lever in said car movable to either side of a neutral position, of a shaft connected to and movable with said lever, spaced enlargements on said shaft, a plate slidable at right angles to said shaft and having an aperture therein flanked by two slots opening into the aperture, so that the shaft may be moved longitudinally only when the aperture is alined with the shaft and the plate may be moved only when the enlargements lieon opposite sides of the the plate with the door locking mechanism.

4. The combination of an elevator car having a controlling lever movable from new tral to operative positions, a door operativcly arranged at a doorway in the traverse of the said car, a door lock,'a cam carried by the car and co-operative with saidlock, and a cam operating mechanism on the car and independent of the control lever when the latter is in the neutral position for actuating said cam to unlock the door and including means for locking the lever in the neutra position when the door is unlocked.

In testimony whereof, I have hereunto set my hand.

' GEORGE BOTSCHEIDER. 

